Put both the feeder mouse and rat into the enclosure. Your snake will smell the mouse and go into kill mode. He will probably strike whatever moves. Maybe put the mouse in a box with holes so your snake can smell it, but not eat it so the rat has a higher chance at getting eaten. When I switched my pinstripe, I put a mouse and a rat into his tub. He took the mouse first. I was a little bummed out. But a second later he took the rat. And ever since, he's been in rats.
Sent from my ADR6300 using Tapatalk